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Flight Reliability

DL 4897 · Delta Air Lines

Indianapolis → Detroit (IND–DTW)96% of its flights flew this route. The rest (ATL–AVL) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
3 min
Average arrival delay
1.9%
Cancelled
12 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

DL 4897 departing between 6–9 AM arrived on time 90% of the time, versus 79% between 9 PM–12 AM.

Skip Saturday if you can.

DL 4897 arrived on time 96% of the time on Thursdays. On Saturdays: 83%.

A bit ahead of the IND–DTW route.

DL 4897 arrived on time 90% of the time, versus 83% across the IND–DTW route.

Better than the Delta Air Lines network average.

DL 4897 arrived on time 90% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon90%(51 flights)
  • Tue86%(50 flights)
  • Wed87%(52 flights)
  • Thu96%(51 flights)
  • Fri94%(49 flights)
  • Sat83%(52 flights)
  • Sun92%(51 flights)
On-time by departure window
  • 6–9 AM90%(341 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM79%(14 flights)
On-time trend by month
97%
May

Jun 83% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%29
July 202583%30
August 202594%31
September 2025100%30
October 202593%30
November 202597%30
December 202586%29
January 202682%28
February 202693%28
March 202681%31
April 202686%29
May 202697%31
Departures on time
90%
Diverted
0%
Flights flown
356
Months covered
12

Same route, other flights

Keep nerding

Based on 363 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.